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Title: VERITAS and Fermi-LAT Observations of TeV Gamma-Ray Sources Discovered by HAWC in the 2HWC Catalog
Authors: A. U. Abeysekara
A. Archer
W. Benbow
R. Bird
R. Brose
M. Buchovecky
J. H. Buckley
V. Bugaev
A. J. Chromey
M. P. Connolly
W. Cui
M. K. Daniel
A. Falcone
Q. Feng
J. P. Finley
L. Fortson
A. Furniss
M. Hütten
D. Hanna
O. Hervet
J. Holder
G. Hughes
T. B. Humensky
C. A. Johnson
P. Kaaret
P. Kar
M. Kertzman
D. Kieda
M. Krause
F. Krennrich
S. Kumar
M. J. Lang
T. T.Y. Lin
S. McArthur
P. Moriarty
R. Mukherjee
S. O'Brien
R. A. Ong
A. N. Otte
N. Park
A. Petrashyk
M. Pohl
E. Pueschel
J. Quinn
K. Ragan
P. T. Reynolds
G. T. Richards
E. Roache
C. Rulten
I. Sadeh
M. Santander
G. H. Sembroski
K. Shahinyan
I. Sushch
J. Tyler
S. P. Wakely
A. Weinstein
R. M. Wells
P. Wilcox
A. Wilhelm
D. A. Williams
T. J. Williamson
B. Zitzer
S. Abdollahi
M. Ajello
L. Baldini
G. Barbiellini
D. Bastieri
R. Bellazzini
B. Berenji
E. Bissaldi
R. D. Blandford
R. Bonino
E. Bottacini
T. J. Brandt
P. Bruel
R. Buehler
R. A. Cameron
R. Caputo
P. A. Caraveo
D. Castro
E. Cavazzuti
E. Charles
G. Chiaro
S. Ciprini
J. Cohen-Tanugi
D. Costantin
S. Cutini
F. D'Ammando
F. De Palma
N. Di Lalla
M. Di Mauro
L. Di Venere
A. Dominguez
C. Favuzzi
S. J. Fegan
A. Franckowiak
Y. Fukazawa
S. Funk
P. Fusco
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
Laboratoire Univers et Particules de Montpellier
Laboratoire Leprince-Ringuet
Kavli Institute for Particle Astrophysics and Cosmology
Santa Cruz Institute for Particle Physics
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
University of Wisconsin-Madison
Agenzia Spaziale Italiana
California State University, East Bay
Hiroshima University
California State University, Los Angeles
Deutsches Elektronen-Synchrotron (DESY)
Columbia University in the City of New York
University of Minnesota Twin Cities
Università di Pisa
Alma Mater Studiorum Università di Bologna
University of California, Los Angeles
Universidad Complutense de Madrid
Clemson University
The Enrico Fermi Institute
University of Utah
The University of Alabama
Tsinghua University
University of Iowa
Università degli Studi di Bari
Universität Potsdam
Harvard-Smithsonian Center for Astrophysics
Georgia Institute of Technology
Università degli Studi di Trieste
Università degli Studi di Napoli Federico II
Università degli Studi di Torino
Washington University in St. Louis
Barnard College
Purdue University
National University of Ireland Galway
NASA Goddard Space Flight Center
DePauw University
University College Dublin
Iowa State University
McGill University
Pennsylvania State University
Cork Institute of Technology
Friedrich-Alexander-Universität Erlangen-Nürnberg
Bartol Research Institute
Università degli Studi di Padova
Keywords: Earth and Planetary Sciences;Physics and Astronomy
Issue Date: 10-Oct-2018
Citation: Astrophysical Journal. Vol.866, No.1 (2018)
Abstract: © 2018. The American Astronomical Society. All rights reserved. The High Altitude Water Cherenkov (HAWC) collaboration recently published their 2HWC catalog, listing 39 very high energy (VHE; >100 GeV) gamma-ray sources based on 507 days of observation. Among these, 19 sources are not associated with previously known teraelectronvolt (TeV) gamma-ray sources. We have studied 14 of these sources without known counterparts with VERITAS and Fermi-LAT. VERITAS detected weak gamma-ray emission in the 1 TeV-30 TeV band in the region of DA 495, a pulsar wind nebula coinciding with 2HWC J1953+294, confirming the discovery of the source by HAWC. We did not find any counterpart for the selected 14 new HAWC sources from our analysis of Fermi-LAT data for energies higher than 10 GeV. During the search, we detected gigaelectronvolt (GeV) gamma-ray emission coincident with a known TeV pulsar wind nebula, SNR G54.1+0.3 (VER J1930+188), and a 2HWC source, 2HWC J1930+188. The fluxes for isolated, steady sources in the 2HWC catalog are generally in good agreement with those measured by imaging atmospheric Cherenkov telescopes. However, the VERITAS fluxes for SNR G54.1+0.3, DA 495, and TeV J2032+4130 are lower than those measured by HAWC, and several new HAWC sources are not detected by VERITAS. This is likely due to a change in spectral shape, source extension, or the influence of diffuse emission in the source region.
ISSN: 15384357
Appears in Collections:Scopus 2018

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